#include <iostream>
using namespace std;
#define ll long long
ll a[105];
int main() {
string s = "";
for (ll i = 1; i <= 100; i++)
{
s += to_string(i);
}
ll n; cin >> n;
string key = "";
for (ll i = 1; i <= n; i++)
{
cin >> a[i];
}
for (ll i = 1; i <= n; i++)
{
key += s[a[i] - 1];
}
cout << key;
}
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